Granted Patent
Utility
US 6,474,348 · App. 09/409,833
CNC core removal from casting passages
Inventors:
James L. Beggs, Paul C. Jensen
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Sep 30, 1999
Inventors
James L. Beggs
Paul C. Jensen
Assignees (at issue)
Howmet Research Corporation
Controlco Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.